package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.DataOverViewQueryDTO;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ReportMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;


import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {


    @Resource
    private ReportMapper reportMapper;

    @Resource
    private OrderMapper orderMapper;

    @Resource
    private UserMapper userMapper;

    @Resource
    private WorkspaceService workspaceService;
    //营业额统计接口
    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin= begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date对应的营业额数据,指已完成的订单
            //select sum(amount) from orders where order_time > ? and order_time < ? and status=5
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover=turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }


    //用户统计接口
    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin= begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList=new ArrayList<>();
        List<Integer> totalUserList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map=new HashMap<>();
            map.put("end",endTime);
            //select count(id) from user where create_time < ?
            Integer totalUser= userMapper.countByMap(map);
            map.put("begin",beginTime);
            //select count(id) from user where create_time < ? and create_time > ?
            Integer newUser= userMapper.countByMap(map);

            newUserList.add(newUser);
            totalUserList.add(totalUser);

        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }


    //订单统计接口
    @Override
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin= begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> orderCountList=new ArrayList<>();
        List<Integer> validOrderCountList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime,endTime,null);
            Integer validOrderCount=getOrderCount(beginTime,endTime,Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        //计算时间段的订单总数和有效订单数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate=0.0;
        if(totalOrderCount != 0){
            orderCompletionRate= validOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .validOrderCount(validOrderCount)
                .totalOrderCount(totalOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap<>();
        map.put("end",end);
        map.put("begin",begin);
        map.put("status",status);
        return orderMapper.orderCountByMap(map);
    }


    //查询销量排名top10接口
    @Override
    public SalesTop10ReportVO top10( DataOverViewQueryDTO dataOverViewQueryDTO) {
        LocalDateTime beginTime = LocalDateTime.of(dataOverViewQueryDTO.getBegin(), LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(dataOverViewQueryDTO.getEnd(), LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> nameList=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList=salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        return SalesTop10ReportVO
                .builder()
                .nameList(StringUtils.join(nameList, ","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }


    //导出Excel报表接口
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库,获取营业数据--最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));


        //通过POI数据写到excel文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间:"+dateBegin+"至"+dateEnd);
            sheet.getRow(3).getCell(2).setCellValue(businessDataVO.getTurnover());
            sheet.getRow(3).getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            sheet.getRow(3).getCell(6).setCellValue(businessDataVO.getNewUsers());
            sheet.getRow(4).getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            sheet.getRow(4).getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for(int i=0;i<30;i++){
                LocalDate date=dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                XSSFRow row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //通过输出流excel文件下载到浏览器
            ServletOutputStream outputStream=response.getOutputStream();
            excel.write(outputStream);
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }



    }
}
